超疏水超亲油304不锈钢网的制备及其油水分离性能

Preparation of Superhydrophobic and Super-Oleophilicity 304 Stainless Steel Mesh and Its Performance of Oil-Water Separation

目前,用于油水分离的材料成本高,制备工艺复杂且效果较差,针对这一现象,选用304不锈钢网作为基体材料,通过氯化铁溶液刻蚀法获得粗糙表面,随后用十七氟癸基三甲氧基硅烷对该表面进行改性,成功制备出具有优异油水分离特性的超疏水超亲油不锈钢滤网,并对其结构及性能进行了测试表征。结果表明:超疏水不锈钢网与水的接触角达到151°,油水分离测试中对黏度小、表面张力小的常见油品分离效率达90%以上,表明其具有优良的油水分离性能;另外,制备的超疏水超亲油不锈钢滤网具有较好的重复使用性,在重复油水分离过程100次后,接触角仍高达145°,并且仍能保持超疏水超亲油的特性。

At present,the oil-water separation materials with high cost and complex preparation process perform poor effect. In order to solve this problem,the 304 stainless steel strainers as substrates were treated by FeCl3 solution etching method to obtain rough surfaces and heptafluorodecyl trimethoxysilane to modify the surface. Finally,the superhydrophobic and supero-leophilic stainless steel meshes with excellent oil-water separation properties were obtained,and the structure and performance were characterized. Results showed that the contact angle between the superhydrophobic stainless steel mesh and water reached 151°. The oil-water separation efficiency reached 90% for the common oil with small viscosity and small surface tension,which indicated the sample processed excellent oil-water separation performance. In addition,the prepared superhydrophobic and super-oil-wet stainless steel mesh had good reusability. After 100 times of repeated oil-water separation,the contact angle drop was still up to 145°,and the superhydrophobicity and super-oleophilicity could still be maintained.